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Since the marine resources were exploited, people
have been worried by the damage caused by sea growth fouling.
The fouling in sea water pipe line and cooling system will decrease
the valid diameter of the pipes and then decrease the flow rate
of the seawater and reduce the cooling efficiency. Even more,
the valves and the pipes of the cooling system could be blocked,
when sea growths were detached. The whole pipeline might be
blocked completely and the machine and production was stopped
when the blocking is serious, causing huge economic loss.
Sea growth fouling is the result of adhering and growing of
sea creatures, plants or microbes on marine facilities.
Ships, ocean oil rigs and the sea water pipelines and cooling
system of seaside power plant and chemical plant will have danger
of damage from both sea water corrosion and sea growth fouling.
There are many ways to prevent sea growth from adhering, such
as antifouling paint, fluid chlorine injection, antifouling
electrolyte, cleaning, heating, and ultrasonic, etc. Different
ways of antifouling have their own advantages and disadvantages.
For example, antifouling painting is relatively easy but is
effective only for short period and is difficult in applying
for small-bore pipeline, meanwhile it has pollution to the environment;
Fluid chlorine has high operating cost and is harmful to human
body and then has safety problem in operation etc.
Antifouling electrolyte is one of the popular technologies in
this area. It is mature, safe, reliable, easy management and
has low operating cost, etc. The antifouling electrolyte technology
includes seawater (salt water) electrolyte to produce chlorine
for antifouling and copper-aluminium electrolyte for both antifouling
and corrosion prevention. These two technologies have been widely
used in many countries. The two technologies can be used together
for their synergetic effect. The anode used for the seawater
(salt water) electrolyte is lead-silver alloy, mixed metal oxide
(MMO), platinum/titanium or platinum/niobium, etc. |
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Electrode products
of electrolytic copper and electrolytic and aluminium
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|
Type
|
Specification (mm)
|
Weight of the anode (Kg)
|
Disposal quantity of seawater (m3/h)
|
HFWT-1 |
φ50x350 |
6 |
100 |
HFWT-2 |
φ75x350 |
12 |
200 |
HFWT-3 |
φ90x350 |
18 |
300 |
HFWT-4 |
φ95x400 |
24 |
400 |
HFWT-5 |
φ95x450 |
27 |
500 |
HFWL-1 |
φ50x350 |
2 |
100 |
HFWL-2 |
φ75x350 |
4 |
200 |
HFWL-3 |
φ90x350 |
6 |
300 |
HFWL-4 |
φ95x400 |
8 |
400 |
HFWL-5 |
φ95x450 |
9 |
500 |
|
| Remark: HFWT- Antifouling copper electrode. HFWL
– Corrosion prevention aluminium electrode. |
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Chlorine
manufacturing electrode products of combination of chlorine
and copper for environmental protection
|
|
Type
|
Specification (mm)
|
Rated A
|
HFWC-1 |
φ3x1500 |
8A |
HFWC-2 |
φ25x300 |
5A |
HFWC-3 |
φ50x300 |
10A |
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| Note: HFWC indicates chlorine manufacturing electrode.
There is only partial types and specifations listed in the table,
and products of different specifications can be made according
to demand. |
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Antifouling director
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Various control apparatus for antifouling were developed with
stable current output, multi-route automatic and manual control,
prompt alarming, etc. The apparatus can be designed and manufactured
according to customers’ demand. |
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