CN203699946U - Two-stage desert sand filter tank - Google Patents
Two-stage desert sand filter tank Download PDFInfo
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- CN203699946U CN203699946U CN201420088303.9U CN201420088303U CN203699946U CN 203699946 U CN203699946 U CN 203699946U CN 201420088303 U CN201420088303 U CN 201420088303U CN 203699946 U CN203699946 U CN 203699946U
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- sand filter
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Abstract
The utility model discloses a two-stage desert sand filter tank, and belongs to the technical field of water pollution control. The two-stage desert sand filter tank comprises a regulating tank, a first-stage desert sand filter tank, a first-stage water reservoir, a second-stage desert sand filter tank, a second-stage water reservoir and a third-stage water reservoir which are sequentially connected, wherein a water absorption horn mouth connected with a lifting pipeline is arranged at the bottom of the regulating tank, and the lifting pipeline lifts wastewater to the first-stage desert sand filter tank through a lifting pump; a filter material and filter columns are arranged in the first-stage desert sand filter tank; the structure of the first-stage water reservoir is the same as that of the regulating tank, the structure of the second-stage desert sand filter tank is the same as that of the first-stage desert sand filter tank, a water absorption horn mouth connected with a lifting pipeline is arranged at the bottom of the first-stage water reservoir, and the lifting pipeline lifts wastewater to the second-stage desert sand filter tank through a lifting pump; and wastewater enters the second-stage water reservoir after filtered by the second-stage desert sand filter tank, a water absorption horn mouth connected with a lifting pipeline is arranged at the bottom of the second-stage water reservoir, and the lifting pipeline lifts wastewater to the third-stage water reservoir through a lifting pump. The two-stage desert sand filter tank is simple and convenient to operate, stable in operation, economical and practical.
Description
Technical field
The invention belongs to technical field of water pollution control, more particularly, relate to a kind of for the unconcerned sand filter of two-stage.
Background technology
In recent years, along with expanding economy, wastewater from chemical industry increasingly sharpened to the pollution of environment, and what in Chemicals production process, discharge is all the Organic pollutants material of complex structure, poisonous and harmful and biological hard degradation mostly, and the difficulty of processing is large.Modern chemical industry wastewater processing technology, by action principle, can be divided into Physical, chemical method, physico-chemical processes and the large class of biological process four.Coagulant sedimentation is to utilize coagulating agent trade effluent to be carried out to a kind of method of purifying treatment.Waste water after coagulating sedimentation, also contains more short grained suspended substance and colloid in water, generally by filtering, suspended particle and colloid are trapped in the surface and internal voids of filtrate.There are pressure filter, moving flushing cage filter chamber and valveless filtering pool in conventional filter tank, and wherein pressure filter running management is more convenient, but its consumption steel are more, and cost is high, and filtrate handling are inconvenient; Moving flushing cage filter chamber pond body structure is simple, pond is deeply more shallow, but its electromechanical control equipment is more, automatically controls and keep in repair more complicated; Valveless filtering pool rinses completely automatically, convenient management, but complex structure, filtrate sealing, handling difficulty.
Summary of the invention
1, goal of the invention
The filler handling difficulty, the cost that in filtration treatment, exist for the waste water after prior art coagulating sedimentation be high, safeguard complicated problem, the invention provides the unconcerned sand filter of a kind of two-stage, and this device and technological operation are easy, stable, economical and practical.2, technical scheme
In order to realize above-mentioned technical purpose, technical scheme of the present invention is as follows:
The unconcerned sand filter of a kind of two-stage, it comprises equalizing tank and filter tank, described filter tank comprises the unconcerned sand filter of one-level and the unconcerned sand filter of secondary, it also comprises one-level retention basin, secondary retention basin and three grades of retention basins, and the described unconcerned sand filter of equalizing tank, one-level, one-level retention basin, the unconcerned sand filter of secondary, secondary retention basin are connected successively with three grades of retention basins;
Described equalizing tank bottom is provided with the water suction hydraucone being connected with riser tubing, described riser tubing by lift pump by waste water lifting to described one-level desert sand filter;
In the unconcerned sand filter of described one-level, be provided with filtrate and Filter column;
The structure of described one-level retention basin is with described equalizing tank, the structure of the unconcerned sand filter of secondary is with the unconcerned sand filter of one-level, one-level retention basin bottom is provided with the water suction hydraucone being connected with riser tubing, this riser tubing by lift pump by waste water lifting to secondary desert sand filter;
After the unconcerned sand filter of secondary filters, enter secondary retention basin, the bottom of secondary retention basin is provided with the water suction hydraucone being connected with riser tubing, riser tubing by lift pump by waste water lifting to three grade retention basin.
Preferably, the agent structure of the described unconcerned sand filter of equalizing tank, one-level, one-level retention basin, the unconcerned sand filter of secondary, secondary retention basin and three grades of retention basins all adopts brick mix structure, lay one deck impervious barrier outward, impervious barrier adopts the matrix material of clay and high density polyethylene(HDPE) composition.
Preferably, the filtrate in the unconcerned sand filter of described one-level and the unconcerned sand filter of secondary is unconcerned husky, and particle diameter is 0.15～0.20mm.
Preferably, Filter column is round shape, and drum surface is provided with filter opening, during cylinder is interior, is provided with solid post, and this solid post adopts brick mix structure.
Preferably, the filter opening aperture D on Filter column in the unconcerned sand filter of one-level
1for 0.12mm, the filter opening aperture D in the unconcerned sand filter of secondary on Filter column
2for 0.10mm, the Filter column in the unconcerned sand filter of described one-level is connected with back flushing pipeline by taper(ed)pipe, and the other end of this back flushing pipeline is connected with the lift pump in one-level retention basin; Filter column in the unconcerned sand filter of described secondary is connected with back flushing pipeline by taper(ed)pipe, and the other end of this back flushing pipeline is connected with the lift pump in secondary retention basin.
Preferably, the aspect ratio of described Filter column (ratio of Filter column height and diameter) is 5:1～8:1.
Preferably, the both sides of the unconcerned sand filter of one-level and the unconcerned sand filter of secondary respectively arrange a valve, by the keying control one-level retention basin of valve and the water inlet of secondary retention basin, guarantee the continuous operation of unconcerned sand filter with this.
A method of wastewater treatment for the unconcerned sand filter of two-stage, the steps include:
A. former water, after equalizing tank regulating pondage, is promoted to the unconcerned sand filter of one-level through lift pump, and after media filtration in the unconcerned sand filter of one-level, filtered water is collected by the Filter column in the unconcerned sand filter of one-level;
B. the filtered water that the Filter column in the unconcerned sand filter of one-level is collected enters one-level retention basin;
C. the storage of water of one-level retention basin is promoted to the unconcerned sand filter of secondary through lift pump, after media filtration in the unconcerned sand filter of secondary, filtered water is collected by the Filter column in the unconcerned sand filter of secondary, and the filtered water of collection enters secondary retention basin, finally rises in three grades of retention basins by lift pump;
D. through filtration after a while, filter opening in the unconcerned sand filter of one-level and the unconcerned sand filter of secondary on Filter column can stop up, now be arranged on the back flushing pipeline between the unconcerned sand filter of one-level, one-level retention basin, the unconcerned sand filter of secondary, secondary retention basin and three grades of retention basins by control, control current, carry out back flushing, back flushing water source is respectively from crossing secondary retention basin and three grades of retention basins.
Preferably, the filtrate in the unconcerned sand filter of described one-level and the unconcerned sand filter of secondary is unconcerned husky, and particle diameter is 0.15～0.20mm.
Described desert sand take from the sand in desert, and main component is quartz, and content is in 70% left and right, another Fe
2o
3, Al
2o
3, CaO and MgO content in 20% left and right, also have a small amount of feldspar and white mica, particle diameter is between 0.10～0.50mm.The residual mineral that it derives from sandstone and Weathered Granite, passes through mechanical handing (wind-force, waterpower) effect enrichment and forms.
3, beneficial effect
Than prior art, the invention has the advantages that:
(1) the unconcerned sand filter of two-stage of the present invention comprises the unconcerned sand filter of one-level and the unconcerned sand filter of secondary, the unconcerned sand filter of two-stage all adopts unconcerned husky as filtrate, greatly reduced investment and running cost, particularly, in unconcerned husky resourceful northern desert area, cost is more cheap; Through filtration after a while, filter opening in the unconcerned sand filter of one-level and the unconcerned sand filter of secondary on Filter column can stop up, now be arranged on the back flushing pipeline between the unconcerned sand filter of one-level, one-level retention basin, the unconcerned sand filter of secondary, secondary retention basin and three grades of retention basins by control, control current, back flushing is carried out in keying by regulated valve, back flushing water source from crossing secondary retention basin and three grades of retention basins, takes full advantage of filtered water respectively, has reduced working cost;
(2) the unconcerned sand filter of the one-level in structure of the present invention, the unconcerned sand filter structure of secondary are identical, in filter tank, be provided with filtrate and Filter column, the aspect ratio of Filter column is 5:1～8:1, the aspect ratio of this scope had both guaranteed to stablize good outlet effect, also the floor space that has reduced structures, has reduced initial cost expense widely;
(3) in the structure design of the unconcerned sand filter of one-level of the present invention, the unconcerned sand filter of secondary, the filter opening aperture D in the unconcerned sand filter of one-level on Filter column
1for 0.12mm, the filter opening aperture D in the unconcerned sand filter of secondary on Filter column
2for 0.10mm, because adopting uniform filter opening distribution form and suitable one-level, the filter opening aperture combination of the unconcerned sand filter of secondary, reduce the frequency that Filter column blocks, the developing result to different depths filtering layer in the unconcerned sand filter of one-level, the unconcerned sand filter of secondary while also having strengthened back flushing simultaneously;
(4) the present invention is simple in structure, convenient operation, and electromechanical control equipment is less, easy to maintenance;
(5) filtrate of the present invention does not seal, and handling easily; Consumption steel are less, and cost is low.
Accompanying drawing explanation
Fig. 1 is the unconcerned husky filtering basin sectional view of two-stage of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the A-A sectional view of figure;
Fig. 4 is Filter column enlarged diagram of the present invention.
In figure: 1, equalizing tank; 2, the unconcerned sand filter of one-level; 3, one-level retention basin; 4, the unconcerned sand filter of secondary; 5, secondary retention basin; 6, three grades of retention basins; 7, riser tubing; 8, lift pump; 9, Filter column; 91, filter opening; 92, solid post; 93, taper(ed)pipe; 10, water suction hydraucone; 11, agent structure; 12, valve; 13, back flushing pipeline; 14, filtrate.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is elaborated.
Embodiment 1
As Fig. 1,2, the unconcerned sand filter of two-stage, it comprises the unconcerned sand filter 2 of equalizing tank 1, one-level, one-level retention basin 3, the unconcerned sand filter 4 of secondary, secondary retention basin 5 and the three grades of retention basins 6 that connect successively; Equalizing tank 1 bottom is provided with the water suction hydraucone 10 being connected with riser tubing 7, riser tubing 7 by lift pump 8 by waste water lifting to the unconcerned sand filter 2 of one-level; In the unconcerned sand filter 2 of one-level, be provided with filtrate 14 and Filter column 9; The structure of one-level retention basin 3 is with described equalizing tank 1, the structure of the unconcerned sand filter 4 of secondary is with the unconcerned sand filter 2 of one-level, one-level retention basin 3 bottoms are provided with the water suction hydraucone 10 being connected with riser tubing 7, this riser tubing 7 by lift pump 8 by waste water lifting to the unconcerned sand filter 4 of secondary; After the unconcerned sand filter 4 of secondary filters, enter secondary retention basin 5, the bottom of secondary retention basin 5 is provided with the water suction hydraucone 10 being connected with riser tubing 7, and riser tubing 7 passes through lift pump 8 by waste water lifting to three grade retention basin 6.Filtrate 14 in the unconcerned sand filter 2 of one-level and the unconcerned sand filter 4 of secondary is unconcerned husky, and median size is 0.15～0.20mm.The both sides of the unconcerned sand filter 2 of one-level and the unconcerned sand filter 4 of secondary respectively arrange a valve 12.
As shown in Figure 1,3, the structures agent structure 11 of the present embodiment all adopts brick mix structure, lays one deck impervious barrier outward, and impervious barrier adopts the matrix material of clay and high density polyethylene(HDPE) composition.
As Fig. 4, Filter column 9 is round shape, and drum surface is provided with filter opening 91, during cylinder is interior, is provided with solid post 92, and this solid post 92 adopts brick mix structure.Filter opening 91 aperture D in the unconcerned sand filter 2 of one-level on Filter column 9
1for 0.12mm, the filter opening 91 aperture D in the unconcerned sand filter 4 of secondary on Filter column 9
2for 0.10mm, the Filter column 9 in the unconcerned sand filter 2 of one-level is connected with back flushing pipeline 13 by taper(ed)pipe 93, and the other end of this back flushing pipeline 13 is connected with the lift pump 8 in one-level retention basin 3; Filter column 9 in the unconcerned sand filter 4 of secondary is connected with back flushing pipeline 13 by taper(ed)pipe 93, and the other end of this back flushing pipeline 13 is connected with the lift pump 8 in secondary retention basin 5.
The method of wastewater treatment of the unconcerned sand filter of above-mentioned two-stage, the steps include:
A. former water, after equalizing tank 1 regulating pondage, is promoted to the unconcerned sand filter 2 of one-level through lift pump 8, and after in the unconcerned sand filter 2 of one-level, filtrate 14 filters, filtered water is collected by the Filter column 9 in the unconcerned sand filter 2 of one-level;
B. the filtered water that the Filter column 9 in the unconcerned sand filter 2 of one-level is collected enters one-level retention basin 3;
C. the storage of water of one-level retention basin 3 is promoted to the unconcerned sand filter 4 of secondary through lift pump 8, after in the unconcerned sand filter 4 of secondary, filtrate 14 filters, filtered water is collected by the Filter column 9 in the unconcerned sand filter 4 of secondary, the filtered water of collecting enters secondary retention basin 5, finally rises in three grades of retention basins 6 by lift pump 8;
D. through filtration after a while, filter opening 91 in the unconcerned sand filter 2 of one-level and the unconcerned sand filter 4 of secondary on Filter column 9 can stop up, now be arranged on the back flushing pipeline 13 between the unconcerned sand filter 2 of one-level, one-level retention basin 3, the unconcerned sand filter 4 of secondary, secondary retention basin 5 and three grades of retention basins 6 by control, control current, carry out back flushing, back flushing water source is respectively from crossing secondary retention basin 5 and three grades of retention basins 6.
The unconcerned sand filter 2 of above-mentioned one-level, unconcerned sand filter 4 height of filter media layers of secondary are H
1: 1.0≤H
1≤ 1.5m; Sand face headwater depth is H
2: 1.0≤H
2≤ 1.5m; Superelevation (being the height that the unconcerned sand filter 2 of one-level, unconcerned sand filter 4 walls of secondary exceed liquid level) is H
3: 0.6≤H
3≤ 0.8m; Pool wall is thick is H
4: 0.2≤H
4≤ 0.3m; The unconcerned sand filter 2 of one-level, the unconcerned sand filter of secondary 4 bottoms were water channel, crossed the high H of water channel
5: 0.4≤H
5≤ 0.8; Water backwashing intensity q:1≤q≤5l/s/m
2; Filter column 9 aspect ratio 5:1≤h/D≤8:1; Filtering velocity is V:7≤V≤15m/h.The filter tank working hour is 24 hours, and flushing cycle is 48 hours, and each washing time is 10min.Wherein, height of filter media layer 1.0≤H
1≤ 1.5m, sand face headwater depth 1.0≤H
2≤ 1.5m, under the condition of filtering velocity 7≤V≤15m/h, can stablize outlet effect; Be 0.6≤H in superelevation
3under the condition of≤0.8m, can effectively prevent sewage level too high and produce overflow; Be 1≤q≤5l/s/m in water backwashing intensity
2condition under, can be in the loss that guarantees effectively to reduce in backwash effect filtrate; Under the condition of Filter column aspect ratio 5:1≤h/D≤8:1, can, in the time guaranteeing effectively to utilize different heights filter material layer, control backwash effect, reduce the floor space in filter tank.
Embodiment 2
The unconcerned sand filter of the two-stage of the present embodiment based on above-described embodiment 1 carries out wastewater treatment to following water outlet.Certain defatting-bonderizing waste water (COD:160-180mg/L, phosphoric acid salt (in P): 84-108mg/L, pH value: 4.2-5.1, petroleum-type: 163-215mg/L, Zn
+: 35-40mg/L) after chemical precipitation, flocculation-air floating, effluent quality is COD:72-81mg/L, phosphoric acid salt (in P): 6.6-10.8mg/L, pH value: 4.9-5.8, petroleum-type: 12-23mg/L, Zn
+: 4.7-6.2mg/L,
The method of wastewater treatment of the present embodiment based on above-described embodiment 1, operation basic parameter: a day processing water yield Q is 3000m
3/ d; Height of filter media layer H
1for 1.1m (1.0≤H
1≤ 1.5m); Sand face headwater depth H
2be 1.5 (1.0≤H
2≤ 1.5m); Superelevation H
3for 0.6m (0.6≤H
3≤ 0.8m); Wall thickness H
4be 0.2 (0.2≤H
4≤ 0.3m); Cross the high H of water channel
5for 0.5(0.4≤H
5≤ 0.8); Water backwashing intensity q is 5l/s/m
2(1≤q≤5l/s/m
2); Filter column 9 diameter D are 0.5m, and height h is 3m (aspect ratio 5:1～8:1); Filtering velocity V is 15m/h (7≤V≤15m/h).The filter tank working hour is 24 hours, and flushing cycle is 48 hours, and each washing time is 10min; Filter tank is long is 4m, and wide is 4m, and flooding velocity q is 0.035m
3/ s; Riser tubing mean flow rate v is that 1.12m/s(caliber is DN100); Flow rate of water flow V in back flushing main
waterfor 1.0m/s; The orifice number of Filter column 9 is 34200; Filter opening aperture D
1for 0.12mm, D
2for 0.10mm; Back flushing flow q
gfor 0.013m
3/ s; Back flushing pipeline 13 calibers are 300mm.
Move continuously by above-mentioned operation condition, after the unconcerned sand filter 2 of one-level filters, effluent quality is COD:55-72mg/L, phosphoric acid salt (in P): 1.4-2.8mg/L, pH value: 6.0-6.5, petroleum-type: 13-22mg/L, Zn
+: 1.4-2.2mg/L, after the unconcerned sand filter 4 of secondary filters, effluent quality is COD:23-35mg/L, phosphoric acid salt (in P): 0.2-0.3mg/L, pH value: 6.8-7.5, petroleum-type: 1-3mg/L, Zn
+: 0.7-1.2mg/L, the unconcerned sand filter of secondary 4 stable effluent quality ground reach national grade one discharge standard (CB8978-1998).Filtrate in the unconcerned sand filter 2 of one-level, the unconcerned sand filter 4 of secondary is changed once for every 2 years.
Embodiment 3
The unconcerned sand filter of the two-stage of the present embodiment based on above-described embodiment 1 carries out wastewater treatment to following water outlet.Certain dyeing waste water (COD
cr: 1150-1250mg/L, BOD
5: 210-260mg/L, colourity: 400-500 times, pH value: 9.2-11.6, SS:1800-2200) after suspension, settled organism anaerobic-aerobic-micro-flocculation treatment, effluent quality is COD
cr: 150-360mg/L, BOD
5: 70-80mg/L, colourity: 100-140 times, pH value: 8.5-9.4, SS:200-400,
The method of wastewater treatment of the present embodiment based on above-described embodiment 1, operation basic parameter: a day processing water yield Q is 3000m
3/ d; Height of filter media layer H
1for 1.5m (1.0≤H
1≤ 1.5m); Sand face headwater depth H
2for 1.1m (1.0≤H
2≤ 1.5m); Superelevation H
3for 0.8m (0.6≤H
3≤ 0.8m); Wall thickness H
4for 0.3(0.2≤H
4≤ 0.3m); Cross the high H of water channel
5for 0.8(0.4≤H
5≤ 0.8); Water backwashing intensity q is 1l/s/m
2(1≤q≤5l/s/m
2); Filter column diameter D is 0.5m, and height h is 4m (aspect ratio 5:1～8:1); Filtering velocity V is 8m/h (7≤V≤15m/h).The filter tank working hour is 24 hours, and flushing cycle is 48 hours, and each washing time is 10min.Filter tank height overall H is 4.0m; Filter tank is long is 4.0m, and wide is 5m; Flooding velocity q is 0.035m
3/ s; The orifice number of Filter column 9 is 34200; Filter opening aperture D
1for 0.12mm, D
2for 0.10mm; Back flushing flow q
gfor 0.050m
3/ s; Backwash tube caliber is 500mm.
Move continuously by above-mentioned operation condition, after the unconcerned sand filter 2 of one-level filters, effluent quality is COD
cr: 53-76mg/L, BOD
5: 15-24mg/L, colourity: 40-60 times, pH value: 8.0-8.7, SS:60-90, after the unconcerned sand filter 4 of secondary filters, effluent quality is COD
cr: 30-48mg/L, BOD
5: 10-14mg/L, colourity: 20-40 times, pH value: 7.2-8.1, SS:20-50, reaches to stable effluent quality national grade one discharge standard (CB8978-1998).Filtrate in the unconcerned sand filter of I and II is changed once for every 2 years.
Claims (7)
1. the unconcerned sand filter of two-stage, it comprises equalizing tank (1) and filter tank, it is characterized in that, described filter tank comprises the unconcerned sand filter of one-level (2) and the unconcerned sand filter of secondary (4), it also comprises one-level retention basin (3), secondary retention basin (5) and three grades of retention basins (6), and described equalizing tank (1), one-level unconcerned sand filter (2), one-level retention basin (3), the unconcerned sand filter of secondary (4), secondary retention basin (5) are connected successively with three grades of retention basins (6); Described equalizing tank (1) bottom is provided with the water suction hydraucone (10) being connected with riser tubing (7), and described riser tubing (7) passes through lift pump (8) by the unconcerned sand filter of one-level (2) extremely described waste water lifting; In the described unconcerned sand filter of one-level (2), be provided with filtrate (14) and Filter column (9);
The structure of described one-level retention basin (3) is with described equalizing tank (1), the structure of the unconcerned sand filter of secondary (4) is with the unconcerned sand filter of one-level (2), one-level retention basin (3) bottom is provided with the water suction hydraucone (10) being connected with riser tubing (7), this riser tubing (7) by lift pump (8) by waste water lifting to secondary desert sand filter (4);
After filtering, the unconcerned sand filter of secondary (4) enters secondary retention basin (5), the bottom of secondary retention basin (5) is provided with the water suction hydraucone (10) being connected with riser tubing (7), and riser tubing (7) passes through lift pump (8) by waste water lifting to three grade retention basin (6).
2. the unconcerned sand filter of a kind of two-stage according to claim 1, it is characterized in that, the agent structure (11) of described equalizing tank (1), one-level unconcerned sand filter (2), one-level retention basin (3), the unconcerned sand filter of secondary (4), secondary retention basin (5) and three grades of retention basins (6) all adopts brick mix structure, lay one deck impervious barrier outward, impervious barrier adopts the matrix material of clay and high density polyethylene(HDPE) composition.
3. the unconcerned sand filter of a kind of two-stage according to claim 2, is characterized in that, the filtrate (14) in the described unconcerned sand filter of one-level (2) and the unconcerned sand filter of secondary (4) is unconcerned husky, and particle diameter is 0.15～0.20mm.
4. the unconcerned sand filter of a kind of two-stage according to claim 3, is characterized in that, Filter column (9) is round shape, and drum surface is provided with filter opening (91), during cylinder is interior, is provided with solid post (92), and this solid post (92) adopts brick mix structure.
5. the unconcerned sand filter of a kind of two-stage according to claim 2, it is characterized in that, filter opening (91) aperture D1 in the unconcerned sand filter of one-level (2) on Filter column (9) is 0.12mm, filter opening (91) aperture D2 in the unconcerned sand filter of secondary (4) on Filter column (9) is 0.10mm, Filter column (9) in the described unconcerned sand filter of one-level (2) is connected with back flushing pipeline (13) by taper(ed)pipe (93), and the other end of this back flushing pipeline (13) is connected with the lift pump (8) in one-level retention basin (3); Filter column (9) in the described unconcerned sand filter of secondary (4) is connected with back flushing pipeline (13) by taper(ed)pipe (93), and the other end of this back flushing pipeline (13) is connected with the lift pump (8) in secondary retention basin (5).
6. the unconcerned sand filter of a kind of two-stage according to claim 5, is characterized in that, the aspect ratio of described Filter column (9) is 5:1～8:1.
7. the unconcerned sand filter of a kind of two-stage according to claim 6, it is characterized in that, the both sides of the unconcerned sand filter of the unconcerned sand filter of one-level (2) and secondary (4) respectively arrange a valve (12), the water inlet of keying control one-level retention basin (3) and secondary retention basin (5) by valve (12), guarantees the continuous operation of unconcerned sand filter with this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420088303.9U CN203699946U (en) | 2014-02-28 | 2014-02-28 | Two-stage desert sand filter tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420088303.9U CN203699946U (en) | 2014-02-28 | 2014-02-28 | Two-stage desert sand filter tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203699946U true CN203699946U (en) | 2014-07-09 |
Family
ID=51050413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420088303.9U Expired - Fee Related CN203699946U (en) | 2014-02-28 | 2014-02-28 | Two-stage desert sand filter tank |
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| Country | Link |
|---|---|
| CN (1) | CN203699946U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803667A (en) * | 2014-02-28 | 2014-05-21 | 环境保护部南京环境科学研究所 | Two-stage desert sand filter and wastewater treatment method thereof |
| CN104876409A (en) * | 2015-06-11 | 2015-09-02 | 环境保护部南京环境科学研究所 | Device for removing heavy metals and polycyclic aromatic hydrocarbons in bottom sediment of river channels and method thereof |
-
2014
- 2014-02-28 CN CN201420088303.9U patent/CN203699946U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803667A (en) * | 2014-02-28 | 2014-05-21 | 环境保护部南京环境科学研究所 | Two-stage desert sand filter and wastewater treatment method thereof |
| CN103803667B (en) * | 2014-02-28 | 2016-01-27 | 环境保护部南京环境科学研究所 | The unconcerned sand filter of a kind of two-stage and method of wastewater treatment thereof |
| CN104876409A (en) * | 2015-06-11 | 2015-09-02 | 环境保护部南京环境科学研究所 | Device for removing heavy metals and polycyclic aromatic hydrocarbons in bottom sediment of river channels and method thereof |
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