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GE E-Cell MK-3 Technical Training Presentation

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GE E-Cell MK-3

Technical Training Presentation

2 /GE /

2008년 2월 16일

EDI EVOLUTION

Pretreatment Cation IX Anion IX Mixed Bed

Pretreatment Mixed Bed

Caustic Acid

R.O. EDI

R.O.

Caustic

Acid

Pretreatment

3 /GE /

2008년 2월 16일

Role of EDI in RO/EDI SystemsRO initial demineralization step> remove ionic impurities, particles, high molecular

weight organics> rejection relative to feed

– ca. 95-99% rejectionEDI final demineralization step> remove residual ionic and ionizable impurities> must meet absolute specifications (resistivity,

sodium, silica, boron) required by customer’s processes.

4 /GE /

2008년 2월 16일

MK-3 FeaturesThe MK-3 has been designed to provide the same performance as the MK-2E, with a few additional benefits.

New Features• No concentrate recirculation required • No Brine injection • Improved stack energy efficiency• Less susceptible to thermal damage

MK-2E Features continued with MK-3• No stack bolt tightening• Guaranteed not to leak• No salt bridging

5 /GE /

2008년 2월 16일

Ease of Operation• No Concentrate Recirculation loop to control• No Brine Injection to operate & maintain • Once through design = less complicated system

Lower Operating Cost• No Concentrate Pump• No Salt • Lower system operating power ~ 0.5 to 1.0 kWhr/1000gal

MK-3 Benefits

6 /GE /

2008년 2월 16일

Process Principles- EDI ProcessFeed

HSiOHSiO33-- COCO33

== OHOH--

HH++

ClCl--SOSO44== NONO33

-- HCOHCO33--

-

Anion Membrane

Cation Membrane

NaNa++CaCa++++ MgMg++++ Na+Na+

Anion Membrane

Cation Membrane

High Purity Water

CaCa++++ MgMg++++ NaNa++HH++

Anode Waste

Concentrate

Anode (+)

Cathode(-)

Cathode Waste

High Purity Water

Concentrate

HSiOHSiO33--

COCO33== OHOH--ClCl-- NONO33

-- HCOHCO33-- HSiOHSiO33

--SOSO44==

HH++

7 /GE /

2008년 2월 16일

MK-2E Flow Path

MK-3 Flow Path

Co-currentvs. Counter-Current

Brine Recirculationvs. Once Through

8 /GE /

2008년 2월 16일

PretreatmentReverse Osmosis Permeate required to minimize:> Scaling> Organic fouling> Particulate and colloidal plugging> Chemical cleaning

Other Possible Pretreatment Combines w/ RO treatment> MicroFiltration/UltraFiltration> Cartridge Filters (CF)> Degasification – Membrane/NaOH Injection/Forced Draft> UV TOC Destruct (UV)> Softeners

9 /GE /

2008년 2월 16일

Feed Water RequirementsParameter MK-2E Ionics EDI MK-3Total Exchangeable 25mg/l 25mg/l Anion (TEA as CaCO3)Conductivity ( NaHCO3) <28 µS/cm <40 µS/cm <43 µS/cm Hardness (as CaCO3) <0.50mg/l <0.25mg/l <1.0mg/l Silica <0.50mg/l <1.0mg/l <1.0mg/lTOC <0.50mg/l <0.5mg/l <0.50mg/lTotal Chlorine <0.05mg/l <0.1mg/l <0.05mg/lTemperature 5 – 38 deg C 10 – 40 deg C 5 – 38 deg CpH 5 – 9 4 - 10 4 – 11Fe, Mn, H2S <0.01mg/l <0.01mg/l <0.01mg/lTurbidity <1 NTU <1 NTUMax Voltage DC 400 600 300Max Amperage 4.5 10 5.2

Typically all EDI state approximately the same inlet feed water requirements.

10 /GE /

2008년 2월 16일

New StacksMK-3 MK-3Pharm MK-3Mini

SAP P/N 3018626 3020056 3018627

Nominal Flow Rate 15 gpm 18 gpm 5 gpmFlow Rate Range 7.5 – 20gpm 7.0 – 20gpm 2.5 – 6.5gpm

Recovery 87 – 95% 87 – 95% 85 – 95%

Nominal Electrode Flow 0.35gpm

Typical Power Consumption 0.5 – 1 kWhr/1000gal

Concentrate Flow Counter current or co-currentDirection

Inlet Pressure 70 – 100psi

11 /GE /

2008년 2월 16일

E-Calc & Feed Water RequirementsMost important design factors that can be adjusted: feed ionic load (TEA), overall flow rate of system, flow rate per stack, silica guarantee & temperatureNew for the MK-3 E-Calc:

1. Basic PFD – showing projected flows and pressures2. Predicted maximum product Na, Cl & SiO2

concentrations as well as Product Outlet pressure.

E-CALC MK-3 rev 3.xls

12 /GE /

2008년 2월 16일

Design of GEMK3 Standard SystemsMechanical System Components

• E-Cell MK-3 StacksTM

• Hard Piping to stacks• Concentrate flows counter current to Dilute flow• Valves for isolation, control and sampling• Grounding

Electrical System Components

• Rectifier – 300VDC Maximum Output with Individual Current Monitoring• PLC – GE Fanuc – standard AB or Junction Box - optional• Instrumentation:

Basic Systems Premium SystemsPressure Gauges Pressure TransmittersRotameters with flow switches Flow Transmitters – All flowsFlow Transmitter on Dilute Out Resistivity sensorResistivity sensor DCS Interface

13 /GE /

2008년 2월 16일

Design of GEMK3 Standard Systems

Why are the GEMK3 systems designed with the Concentrate stream flowing counter current to the Dilute stream?

• Systems are designed for any hardness level feeding into the system – provides the largest amount of flexibility.

Why are the MK-3 stacks capable of having the Concentrate stream flowing in both counter-current and co-current to the Dilute Stream?

• Counter-current concentrate flow allows the MK-3 to have a much higher hardness tolerance

• Counter-current is the standard design• Co-current flow is only allowable if system is being fed with a double pass RO. • Provides some flexibility to retrofit current MK-1 and MK-2 series systems.

14 /GE /

2008년 2월 16일

Design of GEMK3 Standard SystemsWhat GEMK3 Standard System can not do:•Run co-current concentrate flow•Be used in Sanitary/Pharmaceutical applications•Be Hot Water sanitized•Use Stainless steel piping

For the above designs, the E-Cell system is a custom design.

When quoting a system requiring the above, please do not use the GEMK3 nomenclature.

Currently only have standard 60Hz, ANSI designs, we are continuing to work on 50Hz and DIN designs.

15 /GE /

2008년 2월 16일

Sample P&ID

16 /GE /

2008년 2월 16일

Sample General Arrangement

Limitations of EDI

18 /GE /

2008년 2월 16일

Limitations of All EDI

Number 1 reason EDI systems fail in the field is feed water hardness.

> High hardness leads to scaling which can lead to thermal damage.

> System needs to be cleaned in a timely manner.> To minimize scaling, the MK-3 can operate in

counter current mode – all standard GEMK3 systems operate in counter current mode

19 /GE /

2008년 2월 16일

Limitations of All EDI

Number 1 reason EDI systems produce poor product quality in the field is high CO2 in the feed water.

> The resin within the stack can be overwhelmed > Most people only measure conductivity into the EDI

system, but fail to measure CO2.> Ensure that a proper projection is completed on the

feed water.> Check CO2 at regular intervals.

20 /GE /

2008년 2월 16일

Feedwater must be RO direct-coupled quality

Physical, biological and chemical contamination must be prevented

> Physical: PVC shavings; metal shavings; dirt; dust; pollen; welding debris; resin beads/fines

> Chemical: oxidizers such as chlorine; polyvalent cations, such as iron, manganese

Sources of contamination: open storage tank, degasifier, or softener without filtration before E-Cell

Limitations of All EDI – Feed Water

Questions????