mexel presentation for seawater intake

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A room is not painted by filling the room with paint

MexelMexel® ® The all-purpose and sustainable solution to fouling, scale and corrosion in hydraulic systems.

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MEXEL process is based on simple idea that it is:

more efficient, less expensive, has less impact on environment,

to treat at surface level, instead to sterilize the whole mass of water MEXEL Process is a "Green" process which offers

an alternative to usual techniques using oxidants (Cl2 or Br) + ferrous sulfate + anti-scaling agents


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MEXEL 432/0: None oxidant stable emulsion, made from alkyl amines

Application principle: 1/2 hour intermittent daily injection (optimized in operation), of a micro dose (5 mg/l) of a tensioactive emulsion, having dispersant properties

How MEXEL 432/0 works: MEXEL 432/0 migrates to internal surfaces within the hydraulic system & Intake Structure forming a protective film at the molecular level, which provides treatment and protection of the system;

Cumulates five (5) effects:1. Fouling control,2. Scaling control, 3. Corrosion control, 4. Mussels “repealing” effect,5. Fluidization and dispersion of mud


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MEXEL 432/0 complies with regulations governing environmental sustainability


1. No chlorine discharge at cooling water circuit discharge,2. No impact on environment, (impact studies),3. Non toxic versus mammals, as demonstrated by numerous

specific laboratory tests performed on specific organisms: mammals, Bacteria, algae, Crustacean, Mollusk, Fishes…

4. Biodegradable product,5. Does not contain heavy metal nor organ halogen substances, 6. Substances used don't present any recognized carcinogenic

effect, 7. No mutagen or clastogen, 8. No endocrine perturbation, as proven by tests,9. No action on human DNA.

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List of major registrations and homologations:

MEXEL 432 is conform to New EC 98/8 Directive (biocides)

OSPAR (HONCF): North Sea and North Atlantic Ocean,

U.S. Environmental Protection Agency (EPA); Reg No: 69100-1

EC (IPPC): BAT’s (Best Available Technique)

Netherlands: Staatstoezicht op de Mijnen – Reg: 94074874,

Hong Kong Govt Environmental Protection Dept - Reg: (41) in EP 70/A4/1,

Tunisia – C S E. Reg: 17/03/2003

Australia, Chile

France - EDF: process qualification at issue of a 10 years trial test, based on sanitary, technical an economical criteria

In progress: Japan, India, Algeria, Morocco, Philippines, Malaysia…


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Description CHLORINE MEXEL

ActionBiocide: sterilisation of water flow Treatment of Cooling

Water surfaces

ObjectiveTo kill micro and macro organisms Control proliferation of

micro and macro organisms

Toxicity Very toxic on mammals Non toxic on mammals

Impact on environment

Non conform to sustainable development

No impact - Based on EDF Le Havre data)

Colateral aspects

1. Hazardous efficiency (hot water),2. Develop micro & macro organism resistance,3. Corrosion effect,4. Safety

No risk


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MEXEL eco-toxicological benefitsDESCRIPTION CHLORINE MEXEL

Stability Not stable 24 monthsContaminants and by products Tri halomethane

bromamines,chloramines, …

(subject to Cl2 source)

Biodegradable

Thermal sensibility Yes No

Chemical composition Oxidant None oxidant

Carcinogenity: - IARC (International Agency for Research on Cancer) - NTPC (National TocicologyProgram Carninogen) - OSHA (Occupational Safety and Health Administration)

Products of degradation most

probably carcinogenic

none

Mutagen (according to Ames test) Yes (oxidant) none

Oestrogeno-mimetic ? none

Chromosome aberrations on human ? none

CAPEX HIGH VERY LOW


8MEXEL 432/0 - 5 mg/l - ½ hour per day

3 mg/l

~ 1 mg/l (traces)1 h per day

Including 80% water

CRF

Condenser Unit 1Water intake

Discharge point

2 mg/l – ½ hour per day

Immediate adsorption in substances in suspension

Integration in biological surface membrane

Adsorption on circuit surfaces

Adsorption in mud and scale

Bio

deg

rad

atio

n o

f fr

ee &

ad

orb

ed M

EX

EL

432

/0

3,5 mg/l

MEXEL process typical action

Condenser Unit 2

9

Q

Q/1000

MEXEL 432/0

Static mixer

Dosing pump

Circulating pump

Condenser

Discharge

Aux CW pumps

Diffuser

Auxiliary exchangers

Q/1000 p > 3 bar

10

Wat

er i

nta

ke o

pen

ing

Water intake opening

Dia 10 mm

1 meter

Lifting

1 meter

1 meter

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Very Large circuit

Dosing and storage Package, delivered in

20’ ISO Container

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1. The water cooling circuit is source of unavailability, performance degradation and huge maintenance costs.

2. MEXEL process, which is conform to spirit of sustaining development, has no impact on environment and offers an alternative to usual techniques, which is technically and financially superior.

3. MEXEL process is limited to 1/2 hour intermittent daily injection (to be optimized in service), of a micro dose of a biodegradable emulsion, in the range of 3 mg/l MEXEL 432 residual concentration measured at exchangers inlet MEXEL

4. Process offers 5 benefic effects:1. Controls micro and macro-organisms at circuit surface, 2. Mussels “repealing” effect,3. Reduces corrosion impact,4. Reduces scaling impact,5. Provides mud fluidization and mud dispersion,


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DK6/GDF Power Station Canal outlet

Treated with MEXEL process from 2004

Alive mussels

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Centrale électrique du Havre Centrale électrique du Havre Tranche 1 – Charbon - 9 m3/s - Tranche 1 – Charbon - 9 m3/s - 250 MW250 MW

1997 1998

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Le Havre EDF Power Station Le Havre EDF Power Station (250 + 2 x 600 MW - Coal)(250 + 2 x 600 MW - Coal)

Flow Flow 22 m22 m33/s – Sea water open circuit/s – Sea water open circuitTreated with MEXEL process from 1996Treated with MEXEL process from 1996

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1. Thermal Conventional Plants:1. France:

EDF - Le Havre – 2 x 600 + 1 x 250 MW coal fired – sea water (>12 years) 3 years renewable LT Agreement applicable to EDF Thermal and Nuclear fleet, GDF: DK6 – 2 x 400 MW CCPP – sea water (> 4 years)

2. Tunisia: Radès (STEAG): 4 x 170 MW – HFO – seawater open circuit; 3. Malta: Enemalta – Delimara PS (120 MW); Marsa PS (235 MW – HFO), sea water,4. Greece – Aluminium de Grèce (CCPP)

2. Nuclear Plants: Le Bugey - 2 x 910 MW nuclear – cooling towers3. Diesel Plants

1. Guadeloupe: Jarry Nord (Total 445 MW) diesel PS – open sea water circuit2. Spain: Melilla and Ceuta (Total 360 MW) diesel PS – open sea water circuit

4. Geothermal Plants: West Indies: Bouillante – CFG, Socomine – open sea water circuit5. Hydro Plants:

1. French Guyana: Petit Saut (100 MW) hydro,2. Spain: Castellana de Energia Renovables

6. Ships1. Ships manufacturer: ALSTOM2. Cargos: CGM, SNCM, Gasocean, CMN, Les Abeilles, Delom, Genavir, Blue Star,3. France: Nuclear Aircraft Carrier Charles de Gaulle and other French Navy fleet.4. U.K: 3 nuclear submarines,5. Spain marine: Patrouillère Centinelle

7. Petroleum industry: Naphta-chimie petrochemical plant, Shell, Socimine, Elf Petroland, Maersk Oil & Gaz, Samir,

8. Water networks: Hong Kong: Urban sea water grid serving commercial and residential Buildings, hospitals, and fire fighting hydrant networks.


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List of data required for detailed engineering: 1. Nominal Cooling Water flow to treat,2. Plant regime of operation,3. Tide and Typical Cooling water quality analysis + mud content +

risk of jelly fish, algaes and hydrocarbure pollution,4. CW circuit P&ID, including secondary lines,5. Detailed drawing of Water intake,6. Details of CW ducts (type, diameter, length, material…)7. Condenser and exchangers description: tubes material,

diameters, thickness, Nber of plugged tubes,8. Main components description (trash rack, filter, CW pumps,

valves, debris-filter, continuous cleaning system…), materials,9. Space for installation of MEXEL dosing package,10. Corrective curve: Back up pressure vs sea water temperature and

% output11. Condenser operating parameters (Back up pressure deviation)


mexel presentation for seawater intake

Engineering

mass of water mexel

sustainable solution

hydraulic systems

corrosion control

corrosion effect

q q1000 mexel

water intake discharge

water cooling circuit