High-flux filter systems
I. Overview
Natural water contains a variety of impurities. Broadly speaking, it can be divided into three kinds: suspended substances, colloidal substances, dissolved substances. With the gradual improvement of people's lives, the requirements of various industries for water quality are becoming more and more strict. So the pretreatment of water is very necessary. Practice has proved that the effectiveness of water pretreatment, the long-term stable operation of the subsequent water treatment equipment has a great impact.
Mechanical filter is mainly used for water drainage treatment to remove turbidity, softening water, pure water pre-treatment, remove suspended matter in raw water, mechanical impurities and some colloidal substances. The turbidity of the incoming water should be less than 20 degrees, and the turbidity of the outgoing water can be less than 3 degrees. The mechanical filters produced by our factory are made of stainless steel, steel lined with epoxy and other materials. When stainless steel is used, it can be used for the treatment of food and pharmaceutical water.
2.Structure form
Mechanical filter is composed of outer shell, two ends of head, upper and lower water distribution device, sealing rubber ring, operating pipe valve, pressure gauge, etc. According to the different requirements of water quality, single layer, double layer or multi-layer filter media can be used to meet the water requirements.
3.Application
Mechanical filter is widely used in the pre-treatment of industrial water, domestic water and the water supply and drainage treatment of chemical, printing and dyeing, pesticide, coking, fertilizer, pharmaceutical, solvent, electroplating, environmental protection and other industrial sectors, as well as the deep purification treatment of industrial wastewater.
4, the classification of mechanical filter
Mechanical filters are often divided into gravity type and pressure type according to their different pressures, and the type often used is pressure type, which is divided into small and large according to their specifications.
(1) small mechanical filter is generally made of two materials, one is a high-quality carbon steel container, working pressure ≤ 0.6Mpa; the other is stainless steel, working pressure ≤ 0.4Mpa. backwashing only with pressure water, generally without air scrubbing, filter media can be used according to the raw water quality of single-layer, double or multi-layer.
(2) large mechanical filter: divided into single-flow and dual-flow type two, by the 750-30 (0)0 composition of the series. Treatment of water from 4m ‰ to l00m ridicule, the filter media layer can be used single-layer or double-layer filling.
5, the performance of quartz sand filter media
Quartz sand density (2.5-2.7) than anthracite, and anthracite with the second layer of double or multi-layer material device, is the ideal filter media commonly used in water treatment. Quartz sand filter media is made from quartz sand and gravel through crushing, sieving and purification, and is pure white and lustrous crystal. It has the characteristics of high mechanical strength, good chemical stability, and long service life that filter media should have.
(1)Physical and chemical properties of quartz sand
Physical and chemical properties of quartz sand table
|
Projects |
Indicators |
Projects |
Indicators |
|
Mohs Hardness |
7.5 degrees |
Wear rate |
0.003％ |
|
Melting point |
1480℃ |
Crushing rate |
0.035％ |
|
Density |
2.66g/cm³ |
Hydrochloric acid soluble rate |
0.2％ |
|
Stacking density |
1.75g/cm³ |
SiO2 |
99.8％ |
|
Porosity |
43％ |
|
|
注：外观呈白色光泽的晶体，颗粒坚硬、均匀，不含其它杂质。
(2)一般石英砂滤料的规格
一般石英砂滤料规格表
|
Particle size range (mm) |
Particle size range (mm) |
|
0.5~1.2 |
1.0~1.8 |
|
0.5~1.5 |
1.0~2.5 |
|
0.6~0.9 |
2.0~4.0 |
|
0.8~1.2 |
4.0~8.0 |
|
0.8~2.0 |
8.0~15.0 |
|
1.0~1.5 |
15~25 |
Note: l. Allow individual single particle size error of 0.22mm.
2. allow less than the weight of the lower particle size ≤ 3%.
3. allow greater than the upper limit of the weight of the particle size ≤ 2%.
4. Uneven coefficient K80≤2.0.
6, the filter material gradation
1、Single-layer filter and support layer
The particle size of 0.8-2.O mm quartz sand 700 mm, support layer see the following table (support layer available 2-25 mm of sand and pebbles, according to the actual situation, from fine to coarse layered into).
The composition of the support layer of filter material
|
Hierarchy (from top to bottom) |
Grain size(mm) |
Thickness(mm) |
|
1 |
2—4 |
100 |
|
2 |
4—6 |
100 |
|
3 |
6—15 |
100 |
|
4 |
15—25 |
100 |
The above filter media normal filtration speed l0-17m/h, backwashing water temperature 10 ℃, flushing intensity of 8-10L/m²-S, flushing time l0 a l5 minutes.
2、Double layer filter media
The upper layer is 2-3mm anthracite, the lower layer is 1.0-2.5mm diameter quartz sand, the thickness depends on the water pressure, water production, water quality and other conditions. The support layer is the same as the above table.
3、Multi-layer filter material
Multi-layer material than the general single, double-layer filter media has a greater interception capacity and adaptability, the filter is equipped with five layers of filter. From top to bottom as follows
Anthracite d=2-3mm
Quartz sand d=1.0-2.5mm
Garnet d=0.3-0.5mm
Gravel d=10mm
4, height and particle size depending on water pressure, water production, water quality and other conditions.
The lowermost pebbles as a support layer, layer of filter media has a good gradation and specific gravity difference, so that the best filtration effect, the normal filtration speed l5m / h, when the water through the filter layer of head loss reached 0.O5-0.1MPa is backwashing.
7, the specifications, models and technical parameters of mechanical filterSpecification and performance of steel mechanical filter
|
Model |
Specification(mm) |
Maximum water output(T/h) |
Operating temperature(℃) |
Filtration area (m²) |
Filter speed(m/h) |
Filter media layer height(mm) |
Maximum external dimensions ø |
Net weight(kg) |
|
CJQ-30 |
ø300 |
1.05 |
4-50 |
0.07 |
8-15 |
700 |
ø400x 1652 |
189 |
|
CJQ-40 |
ø400 |
1.89 |
4-50 |
0.126 |
8-l5 |
700 |
ø550×1770 |
242 |
|
CJQ-50 |
ø500 |
2.94 |
4-50 |
0.196 |
8-15 |
1000 |
ø644×2210 |
383 |
|
CJQ-75 |
ø750 |
6.6 |
4-50 |
0.44 |
8-15 |
1000 |
ø884×2385 |
638 |
|
CJQ-100 |
øl000 |
11.8 |
4-50 |
0.78 |
8-15 |
1200 |
ø1012×2297 |
880 |
|
CJQ-150 |
ø1500 |
26.5 |
4-50 |
1.76 |
8-15 |
1200 |
ø1516×3469 |
1506 |
|
CJQ-200 |
ø2000 |
47.1 |
4-50 |
3.14 |
8-l5 |
1200 |
ø2020×3610 |
2455 |
|
CJQ-250 |
ø2500 |
73.6 |
4-50 |
4.90 |
8-l5 |
1200 |
ø2524×4020 |
4179 |
|
CJQ-300 |
ø3000 |
105.9 |
4-50 |
7.06 |
8-15 |
1200 |
ø3028x 4480 |
6355 |
Note: l. The maximum working pressure is 0.6MPa, and the test pressure is 0.9MPa.
2、The inner pebble bedding layer and the filter material layer (quartz sand) are self-supported by the user.
GJQ a 30 type a 75 type steel mechanical filter external dimensions (mm) see Figure l
| Specification |
H |
H1 |
H2 |
H3 |
ø1 |
ø2 |
Mn |
Dgl |
Dg2 |
Dg3 |
|
ø300 |
1652 |
1502 |
1100 |
700 |
400 |
368 |
ø12×12 |
25 |
15 |
40 |
|
ø400 |
1770 |
1620 |
1100 |
700 |
550 |
490 |
øl4×16 |
32 |
25 |
40 |
|
ø500 |
2210 |
2060 |
1500 |
1000 |
644 |
590 |
ø16×18 |
40 |
25 |
50 |
|
ø750 |
2385 |
2235 |
1500 |
1000 |
864 |
824 |
ø18×20 |
65 |
32 |
50 |
GJQ a 100 type a GJQ a 300 type steel mechanical filter external dimensions (mm) see Figure 2
|
Specification |
H |
H1 |
H3 |
H4 |
Ha |
L1 |
L2 |
L3 |
L4 |
Dgl |
Dg2 |
Dg3 |
Dg4 |
Dg5 |
Dg6 |
a |
b |
ø |
|
ø1000 |
2897 |
905 |
905 |
165 |
126l |
629 |
629 |
750 |
470 |
65 |
65 |
80 |
65 |
80 |
40 |
160 |
125 |
990 |
|
ø1500 |
3465 |
1025 |
1025 |
185 |
1426 |
870 |
870 |
1000 |
614 |
80 |
80 |
100 |
80 |
100 |
50 |
180 |
140 |
1450 |
|
ø2000 |
3610 |
1100 |
1100 |
195 |
1481 |
882 |
882 |
1255 |
799 |
100 |
100 |
150 |
100 |
150 |
80 |
250 |
200 |
1800 |
|
ø2500 |
4020 |
1150 |
1150 |
205 |
1661 |
1032 |
1032 |
1500 |
941 |
125 |
125 |
150 |
125 |
150 |
100 |
350 |
300 |
2000 |
|
ø3000 |
4480 |
1200 |
1200 |
220 |
1811 |
1178 |
1178 |
1750 |
1005 |
150 |
150 |
200 |
150 |
200 |
100 |
400 |
300 |
2400 |
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Shijiazhuang Tianwang Environmental Protection Technology Co., Ltd.
Shijiazhuang Tianwang Environmental Protection Technology Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing and sales of water treatment equipment.
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Production address: No. 9, Fengchan Road, Economic and Technological Development Zone, Shijiazhuang City
Office Address: 25th Floor, Block C, No. 310 Changjiang Avenue, Shijiazhuang High-tech Development Zone
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