The
regulations in force on the stocking and valorization of sludge from urban
and industrial purification stations raise a range of problems for operators
:
- size of stock pools
- cost of transporting and handling
- cost of spreading
- cost of final treatments (composting, dehydrating, incinerating etc.)
As
these points are mainly connected with the low concentration of sludge
in dry matter, Société Poitevine de Filtration has developed equipment
for appreciably increasing this parameter :
THE "CONCENTRATEC" DRAINING SCREW.
- Industrial purification station sludge - agricultural foodstuffs, petrochemicals, refineries etc.
- Any type of "flocculatable" sludge "
The
flocculated sludge is conveyed by an Archimedes screw to a separating
grid with Vee-shaped bars forming a trough. The free water flows through
the grid as the sludge progresses. At the screw end the line of sludge
formed in this way, some of the bonded water which it contains is released
by means of careful stirring.
A brush located at the periphery of the screw simultaneously provides
sealing between the grid and the screw and cleans the inner face of the
grid.
The thickened sludge is then cleared away by gravity at the screw end
and the filtrates are collected in a catch tank before being cleared away
by overflowing.
Washing ramps located under the separating grid are for cleaning it with a particularly effective counterflow.
- Stainless steel Archimedes screw, AISI 304L or AISI 316L
- Synthetic material brush
- Stainless steel separating grid, AISI 304L or 316L
- Motor reduction unit, 220/380V, 3-phase, IP 55, with electric variator
- Washing ramps
- Electrical control cabinet
- Flocculation fining tank, static mixer
- Polymer preparation unit
| CONCENTRATEC |
C
05
|
C
10
|
C
20
|
C
40
|
||||||||
| Filtering surface (m2) |
0.66
|
1.7
|
3.2
|
5.25
|
||||||||
| Space requirements L x l x h (m) |
1.9x0.7x1.1
|
2.7x0.8x1.5
|
4.1x1.1x2.1
|
5.6x1.4x2.3
|
||||||||
| Weight (kg) |
260
|
315
|
920
|
1200
|
||||||||
| Generating capacity (kw) |
1.1
|
1.1
|
1.5
|
2.2
|
||||||||
| Frequency rate of 7 bars washing (m3/h) |
7
|
5
|
6
|
8
|
||||||||
| Number of washing ramp |
3
statiques
|
5
stat. ou 2 mobiles
|
2
mobiles
|
2
mobiles
|
||||||||
| Muds concentration in entry (gr/l) |
5
|
10
|
15
|
5
|
10
|
15
|
5
|
10
|
15
|
5
|
10
|
15
|
| Nominal Hydraulic rate (kg/h) |
7
|
5
|
4
|
15
|
13
|
10
|
30
|
26
|
22
|
60
|
50
|
42
|
| Nominal rate of matter (kg/h) |
35
|
50
|
60
|
75
|
130
|
150
|
150
|
260
|
330
|
300
|
500
|
630
|
| Consumption of polymer (kg/T(MS)) |
3-5
|
3-5
|
3-5
|
3-5
|
||||||||
| Muds concentration in exit (g/l) |
70
|
70
|
60
|
70
|
70
|
60
|
70
|
70
|
60
|
70
|
70
|
60
|
Intended for the thickening of urban or industrial waste sludges. This hardware assembly which is installed Intended for the thickening of urban or industrial waste sludges. This hardware assembly which is installed regulations on the valorization of purification station waste sludges.
This trailer is easy to move and connectable to fixed existing facilities, is particularly designed for station operators and autonomously thickens without human monitoring waste sludges collected from several purification stations when unit production does not justify a fixed facility.
2 – Liquid sludge pump, 2 to 11 m3/h
3 – Thick sludge pump, 0 to 3 m3/h
4 – 7 bar washing water booster, with instantaneous flow rate of 10 m3/h
5 – Air compressor
6 – Polymer concentrated emulsion pump, 0 to 2.8 l/h
7 – Electric control cabinet
Platform dimensions : 31000
x 1700
Overall dimensions :
Trailer weight : 1800 Kg
Polymer Preparation
- Storage capacity :
- Polymer pump flow rate : 0 to 2.8 l/h
- In-line dilution : 0 to 1000 l/h
- In-line static mixer
Self-Monitoring :
Minimum liquid polymer level
of liquid sludges
of thick sludges
Minimum washing water pressure
Anti-run on sludge pumps ; capability of connecting a remote alarm system
Power supply voltage rating : 400 V
three-phase + Gnd
Total installed power rating : 12 KW
Power consumption : 16 KVA
Current rating : 25 A
Liquid Sludges
Suction capability : 5 meters max.
Height variation : 3 meters max.
Guillemin hydrant connection (firefighters) :
80 mm dia.
Max. flow rate : 11 m3/h
Thick Sludges
Delivery (outlet) : 5 meters max
Height variation 3 meters max
Guillemin hydrant connection (firefighters) :
40 mm dia.
Flow rate : 1 to 7 m3/h
Industrial Quality Washing
Water
In load
Guillemin hydrant connection (firefighters) :
40 mm dia.
Minimum instantaneous flow rate : 10 m3/h
Polymer Preparation Drinking
Water
Feed pressure : 2 bars minimum
Quick connection ("cat head" multi-union) :
¾ dia. min
Maximum flow rate : 1.5 m3/h
Filtrates
In free flow
Guillemin hydrant connection (firefighters) : 65 mm dia.
Maximum instantaneous flow rate : 10 m3/h
Auxiliary Equipment Items
:
Integral protection tank
Heating system to prevent equipment from freezing
220 V single-phase outlet
Lighting system.
Concentratec 10 :
Refer to the appropriate data sheet
Unthickening capacity :
Inlet concentration : 8 g/l
Outlet concentration : 60 g/l min.
Inlet concentration : 20 g/l
Outlet concentration : 70 g/l min.
For conventional urban waste sludges
Installed power rating : 1.1
KW
Rotational speed of screw : 3 to 15 rpm
Incorporated frequency variator
Cleaning of internal surface of screen by Rilsan brush
Hydraulic cleaning of external surface.
