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Walnut Shell Filter Oil Removal

Source:FLOWSPEC INDUSTRIAL LIMITED Date:2012-03-16 15:43:51

General
Although filtering is the best way of removing the suspended solids in the water, adopting normal filtering process as to oily sewage, the effect is little. Along with the oil field has more and more high request on the injected water purity, we develop the new generation oil filtering equipment after years¡¯ continuously explore and research. It is HY new generation oil filtering equipment, which is the ideal choice for all oily waste water treatment. And now, HY walnut shell filter is playing large role in oil sewage treatment project in different industries.

Features
HY walnut shell filter use walnut shells which are specially processed as its filtering media, because walnut shells special advantages as follows:
1. Walnut shells have strong oil adsorption capacity; it can adsorb most of the oil in the oily sewage.
2. Walnut shells can renewable after back washing; so that walnut shell filter media can be used again, saving water treatment costs.
3. Walnut shells have strong pressure resistance; its pressure resistance is 23.4kgf/cm2.
4. The chemical properties of the walnut shells are stable; it is almost not dissolved in acid and alkali solutions.
5. The hardness of walnut shells is high, and its wear resistance is good too; it can be used for long time.
6. Walnut shells have strong adsorption and pollutant catching capacity (adsorption rate 25-53%)
7. Walnut shells are hydrophilic well, but oil immersion resistant.
8. Because the specific gravity of the walnut shell filter media is little bigger than that of water (1.225g/cm3), it is easy for back washing and regeneration.
The excellent feature of HY walnut shell filter is adopting water before filtering to take back washing, no needing with help of air supply or chemicals. The running costs of walnut shell filter is low, and easy management. The back washing strength of walnut shell filter is small, but the effect is good. Because the walnut shell filter media is nonperishable, its service life is long. And according to water quality requirement, the walnut shell filter can work separately or in series. 

Walnut Shell Filter Operation

Silica Sand
Walnut Shell
Filtering Effect
Oil Removal Rate (%)
40-50
82-93
Suspended Solids Removal Rate (%)
50-65
85-96
Filtering Speed (m/h)
8-12
25-30
Backwashing Strength (L/S.m2)
16
6-7
Filtering Media Maintenance Method
Replace for new every 2-3 years
Add 10% every year

How does a Walnut Shell Filter Work
Walnut shell filter is one type of separation equipment which adopts filtration separation principle and oil resistance filtering media-walnut shells. It is mainly made up of filtering system, washing system and control system (one is automatic while the other is manual). When filtering, the water sewage flow is from up to down, passing through water distributor, filtering media bedding and water collector, and then one time of filtering finishes. When backwashing, the agitator turns over walnut shell filtering media, the water flow is from down to up, making the walnut shell filtering media be washed and regenerated thoroughly.
Technical Specifications

Model
Treated Capacity
(m3/h)
Tank Size
(mm)
Filtering Area
(m2)
Matched Pump Model
Head
(m)
Power
(kW)
Agitator
(kW)
HY-800
10
800
0.5
IS50-32-200A
35
4
4
HY-1000
20
1000
0.79
IS65-40-200A
38
7.5
HY-1200
30
1200
1.13
IS80-65-160A
25
7.5
HY-1600
50
1600
2.010
IS80-50-200
45
15
5.5
HY-2000
80
2000
3.14
IS100-65-200A
38
18.5
11
HY-2400
110
2400
4.52
IS100-65-200
45
22
20
HY-2600
130
2600
5.306
IS150-125-400A
38
37
22
HY-2800
150
2800
6.154
IS150-125-400A
38
37
30
HY-3000
190
3000
7.065
IS150-125-315
32
30
30
Connection Dimensions for HY-800 ~ HY-1600

1
2
3
4
5
6
7
Manhole
Filtering Inlet
/Backwashing Outlet
Bleed Line
Sight Glass
Filtering Outlet
/Backwashing Inlet
Pressure Gauge
after Filtering
Pressure Gauge
before Filtering


Ø1
H
H1
H2
H3
H4
L
2
3
5
800
800
2725
350
110
60
70
548
DN65
DN25
DN65
1000
1000
2980
500
100
100
700
DN80
DN80
1200
1180
2976
400
115
80
75
835
DN100
DN100
1600
1580
3310
500
120
100
1117
DN125
DN125

Connection Dimensions for HY-2000 ~ HY-3000

1
2
3
4
5
6
7
8
Filtering Inlet
/Backwashing Outlet
Bleed Line
Manhole
Access Hole
Sight Glass
Filtering Outlet
/Backwashing Inlet
Pressure Gauge
before Filtering
Pressure Gauge
after Filtering


Ø
Ø1
H
H1
H2
H3
L
b
1
2
6
n
2000
2100
3750
245
150
100
600
32
DN150
DN32
DN150
8
2400
2500
3960
257
130
700
DN200
DN200
2600
2716
4328
344
150
700
2800
2900
4100
270
160
800
3000
3120
4630
350
280
820
DN300
DN300
12

Installation Diagamof Walnut Shell Filter in Series

1
Valve for inlet before filtering
2
Inlet for Pre-filtration tank
3
Valve for backwashing outlet of refined filtration tank
4
Valve for backwashing inlet of pre-filtration tank
5
Vent valve for pre-filtration tank
6
Inlet valve for filtering of refined filtration tank
7
Outlet valve for backwashing of refined filtration tank
8
Inlet valve for backwashing of refined filtration tank
9
Vent valve
10
Outlet valve after filtering
11
Outlet valve for backwashing before pump
12
Exhaust valve

Welcome to contact Flowspec if you are interested in walnut shell filter or walnut shell filter media, because we are one of leading walnut shell filter media suppliers, at the same time that we can supply walnut shell filters for oil removal.