Download - 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
MexelMexel® ® The all-purpose and sustainable solution to fouling, scale and corrosion in hydraulic systems.
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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
MexelMexel® ® The all-purpose and sustainable solution to fouling, scale and corrosion in hydraulic systems.
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MEXEL 432/0 complies with regulations governing environmental sustainability
MexelMexel® ® The all-purpose and sustainable solution to fouling, scale and corrosion in hydraulic systems.
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…
MexelMexel® ® The all-purpose and sustainable solution to fouling, scale and corrosion in hydraulic systems.
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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
MexelMexel® ® The all-purpose and sustainable solution to fouling, scale and corrosion in hydraulic systems.
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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
MexelMexel® ® The all-purpose and sustainable solution to fouling, scale and corrosion in hydraulic systems.
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
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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
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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,
MexelMexel® ® The all-purpose and sustainable solution to fouling, scale and corrosion in hydraulic systems.
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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.
MexelMexel® ® The all-purpose and sustainable solution to fouling, scale and corrosion in hydraulic systems.
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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)
MexelMexel® ® The all-purpose and sustainable solution to fouling, scale and corrosion in hydraulic systems.