Pressure sand filtration Multimedia Filter Water Purification System
Product description:
Technology
Pressure sand filtration is the flow of water through a bed of granular media, normally following settling basins in conventional water treatment trains. The purpose of this filtration is to remove any particulate matter left over after flocculation and settling. The filter process operates based on two principles, mechanical straining and physical adsorption. Sand filtration is a "physical-chemical process for separating suspended and colloidal impurities from water by passage through a bed of granular material. Water fills the pores of the filter medium, and the impurities are adsorbed on the surface of the grains or trapped in the openings." . The key to this process is the relative grain size of the filter medium.
Pressure sand filtration is contrasted to Slow Sand Filteration by increased flow rate, method of cleaning the filter bed. A rapid sand filter can operate up to 40 times faster than a slow sand filter. Rapid sand filters are cleaned often, usually daily, by reversing the flow of water through the entire filter bed, referred to as backwashing Slow sand filters are cleaned less frequently by removal of the top layer of media.
This product is suitable for the filtered water turbidity is generally in the 5 mg / l or less able to meet drinking water quality standards of industrial water or domestic water, industrial and mining enterprises and urban water treatment equipment. Good removal of suspended solids in industrial wastewater solids.
The water containing suspended solids agglomerates sheet bonding colloidal particles can not be removed using the sedimentation method, water may be through a pressure filter fitted within the filter layer, so that the water reaches transparent.
Filter Bed
The most effective is a coarse to fine pore size (the hydraulic radius of the stream line between particles). This allows for a more complete use of the bed area and reduced backwash frequency. Mixed media filter beds are the most common. An ideal mixed media bed may be composed of approximately 30-60 inches of granular media with the following makeup, from inlet to outlet:
12 - 18 inches of anthracite coal with a specific gravity of 1.5 and grain size of 0.7 - 2 mm.. The anthracite has a larger, more angular particle size to trap particulate matter before it gets to the sand layer and clogs it. Anthracite's lower specific gravity allows it to remain on top of the sand layer after backwashing. The anthracite layer also allows a lower backwash velocity to give the same bed expansion than if sand alone were used.
9 - 16 inches of sand - this can be composed of two types.
Silica sand is used in the top 10 - 16 inches. Specific gravity is 2.5 and grain size ranges from 0.4 - 0.8 mm.
Garnet sand may be used in the bottom 3 - 6 inches. Specific gravity is 4.2 and grain size ranges from 0.3 - 8 mm.
The higher specific gravity of garnet allows a finer pore size without the danger of mixing layers during backwashing. After the larger particles have been trapped by the anthracite, the sand media traps the remaining particulate matter by a combination of adhesion and straining.
16-24 inches of 3-6 carefully graded layers of successively coarser gravel. Preferred gravel size is 5 - 60 mm. The gravel maintains a consistent and diffused flow during filtration and prevents disruption of the sand layer during backwash.
Filter media selection (both size and type) may be the most important decision in a rapid sand filter design. Its selection is specific to each treatment plant and depends on the type of influent being filtered, media available and expected quality of effluent.
The main factors influencing the filtering and trapping processes are:
Suspended particle size: Filtration efficiency improves with larger particulate size.
Pore size: The space between the grains determines the size of particulate that can be trapped.
Grain shape: Angular grains participate more in the mechanical straining process.
Filtration velocity: Filtration efficiency decreases with increased velocity.
Temperature of liquid: Increased water temperature, although it normally cannot be controlled, results in more efficient filtration.
Chemical properties of the water and particle: A chemical filter aid may be added to promote adhesion.
Different Types of Pressure Sand Filters
Main technical conditions and instructions
Working pressure: 5kgf/cm2
Water temperature: 20 ° C
Operating speed: 10 m / h
Turbidity: water <20mg / L, the effluent <5 mg / L
¢ 2400 to be equipped with compressed air, red recoil help.
Mechanical filter, in addition to iron, and manganese removal filters, according to user requirements with multiple valve.
Technical parameters sheet for Mechanical sand carbon filter
| model |
Filter diameter |
Total height |
water inlet-outlet |
capacity |
Quartz sand material |
Active carbon material |
| mm |
mm |
mm |
m³/hour |
ton |
ton |
| YL-MF-500 |
500 |
2350 |
DN32 |
2 |
0.39 |
0.11 |
| YL-MF-600 |
600 |
2380 |
DN32 |
3 |
0.56 |
0.16 |
| YL-MF-700 |
700 |
2400 |
DN40 |
4 |
0.76 |
0.22 |
| YL-MF-800 |
800 |
2400 |
DN40 |
5 |
1 |
0.3 |
| YL-MF-900 |
900 |
2500 |
DN50 |
6 |
1.3 |
0.36 |
| YL-MF-1000 |
1000 |
2600 |
DN50 |
8 |
1.6 |
0.45 |
| YL-MF-1200 |
1200 |
2700 |
DN65 |
11 |
2.3 |
0.65 |
| YL-MF-1400 |
1400 |
2800 |
DN65 |
15 |
3 |
0.86 |
| YL-MF-1500 |
1500 |
2850 |
DN65 |
18 |
3.5 |
1 |
| YL-MF-1600 |
1600 |
2900 |
DN80 |
20 |
4 |
1.2 |
| YL-MF-1800 |
1800 |
3000 |
DN80 |
25 |
5 |
1.5 |
| YL-MF-2000 |
2000 |
3100 |
DN100 |
30 |
6 |
1.8 |
| YL-MF-2200 |
2200 |
3180 |
DN100 |
38 |
7.5 |
2.2 |
| YL-MF-2400 |
2400 |
3330 |
DN100 |
45 |
9 |
2.5 |
| YL-MF-2500 |
2500 |
3380 |
DN100 |
50 |
9.7 |
2.8 |
| YL-MF-2600 |
2600 |
3430 |
DN125 |
55 |
10 |
3 |
| YL-MF-2800 |
2800 |
3530 |
DN125 |
60 |
12.5 |
3.5 |
| YL-MF-3000 |
3000 |
3630 |
DN125 |
70-80 |
14 |
4 |
| YL-MF-3200 |
3200 |
3730 |
DN150 |
80-100 |
14 |
4.5 |
Our Services
We provide 24 hours online customer service.
Any inquiry about water treatment system, please feel free to contact me for further details!
Contact information:
Mobile phone: +86 15295068302
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