EPSCO Ltd Energy Sector Cooling System Solutions EPSCO Chemically - - PowerPoint PPT Presentation

EPSCO Ltd

Energy Sector – Cooling System Solutions

EPSCO

Chemically Engineered Solutions, Practically Applied to Solve Emission and Efficiency-Related Problems in Cooling Systems

Common Problems

• Biological Fouling

– biofilms formed by

• rganics, fungi and

bacteria in circulating water

• Sedimentary and

Scaling Deposits

– solids naturally present in water form surface deposits

Effects

• Restricted

Contact Between Air and Water

– reduced heat transfer – decrease in condenser performance

• Spiralling Build

Up from Deposits

– significant weight on pack – system contaminants

• Exhaust steam not

sufficiently cooled

• Air & water flow restrictions

Impacts of Effects

• Increasing water treatment

costs

• Pack collapse

Warmer Water Temperature Decreased Water Flow Restricted Air Flow Reduced Condenser Performance

Fouled Fill-Pack

Warmer Water Temperature Decreased Water Flow Restricted Air Flow Reduced Condenser Performance

Fouled Fill-Pack

Potential Costs & Risks

• Maintenance Issues

– costly pack repairs and replacements – excessive downtime

• System Inefficiencies

– increase in fuel usage – decreased condenser performance

• Environmental Concerns

– surplus water usage – increased carbon emissions – increased plume

• Health Concerns

– airborne particulates (bacteria and water treatment chemicals)

• impacts on company employees and local residents

Traditional Methods of Cleaning Cooling Towers

• High Pressure Water Jetting

– causes irreparable damage to pack and drift eliminators – damages the surface of timber structures – removes wet rot protection – substantial down-time

• largely ineffective

Traditional Methods of Cleaning Cooling Towers

• Changing the Pack

– results in substantial down-time – incurs the cost of new pack – disposal cost of old pack – access and handling Health & Safety concerns

• Biocide Dosing

– prolonged, regular treatment required – does not remove existing deposits or bio- film – limited ability to stop build-up

Patented EPSCO System

Patented EPSCO System

• Initial No-Obligation Survey

– pack assessed by our operatives – samples taken for laboratory analysis – specifically tailored to individual towers and cells – tower/cell mapped due to variation

• f deposit accumulations

– chemical solution determined by survey and laboratory analysis

Patented EPSCO System

• Downtime Minimised

– 12 days for hyperbolic towers, 3-4 hours for conventional forced draft cells – un-treated towers or cells may remain active – minimum disruption to production – non-intrusive

• A Fraction of the Cost of Pack

Replacement

– temperature difference improved by up to 3-4°C – cost of treatment recouped in around 6 months from resulting efficiency gains

Patented EPSCO System

• Tangible results of EPSCO treatment
• Weight reduction in 15m³ section of pack = 1448lbs/658kg
• Pack condition returned to as good as new

Pre v's Post Treatment

500 1000 Pack Layers Weight (pounds) Pre Treatment Post Treatment Pre Treatment 214 522 548 576 563 Post Treatment 197 195 191 197 195 1 2 3 4 5

Note: Results from a 5-layer system

EPSCO – Cost Savings

• Significant Efficiency Gains

– temperature reduction minimises plume

• less requirement to introduce make-up

water into the system as less water is discharged into the atmosphere

– drastic improvements in condenser efficiency

• generating greater power output from

the same fuel usage

Summary

• Level of IPPC Compliance

is Increased

• EPSCO Treatment will

Save Money

EPSCO Ltd

Arran Road Perth PH1 3DZ Scotland UK

+44 1738 446363 info@epsco.co.uk