Transcript INTECNA

DP 4 ELECTRO
ELECTROCOAGULATION COMPACT PLANT
BASIC PRINCIPLES
In electro-coagulation plant, process is realized by an electrolytic cell where anodes
and cathodes are connected with a DC generator.
At the ANODE reaction is
Al (metal)
====
Al 3+
At the CATHODE reaction is
2 H2O + 2 e===== H2
+
+
3 e-
2 OH-
In aqueous environment,
Al3+
+ 3 H2O ==== Al(OH)3
+ 3H+
Total Reaction is
2Al(metal)
+
6H2O
+ 2 OH-
==== 2 Al(OH)4-
+ 3 H2 (gas)
Aluminium Hydroxyls create a flocculation and on the
flocks surface, all suspended material (Oil, fats, dyes,
paints...) are quickly absorbed.
Hydrogen developing improves the floatation of
suspended materials.
In the second part of flocculation tank, floating material is
aggregated by special aqueous Polymer dispersion (
series HYCRAM ELECTRO)
and flocks passes to
filtration.
TYPICAL GENERATOR CHARACTERISTICS
FEEDING
Power 400 VA three phases
Frequency
50 – 60 Hz
Power absorbed 8,6 KWA
GENERATED DIRECT CURRENT (DC)
Current
300 A
Potential
24 V
Power (theory)
8,6 KWA
Regulation
0-100 %
TYPICAL ELECTRODES ASSEMBLY
Retention time in electrolytic cell is regulated by calibrating starting process by our
Technical Service.
Substantially, retention time is connected with Aluminium Hydroxyls formation.
Such parameter is regulated by Faraday’s Law
m = 1/95600 * A / V * I *t
Where
m = mass in grams of Aluminium dissolved
A = Atomic Mass of Aluminium ( 27)
V = Valence of Aluminium ( 3)
I = Current (Amperes)
t = time in second
By our proprietary software we can evaluate the connections between :
Flow-rate of wastewater
Retention time in electrolytic cell
Aluminium dissolved
Equivalent to Aluminium Hydroxyls compounds
DP 4 ELECTRO GENERAL VIEW
DP 4 ELECTRO RENDERING